ALBERT D. JOHNSON / Special to SignOnSanDiego
Authorities question several of the drivers of the vehicles that struck a pedestrian on I-805 early Thursday.

A man who was walking in traffic lanes on southbound Interstate 805 was struck by several vehicles and killed early Thursday morning, authorities said.

It was not known why the man was walking on the freeway just north of Home Avenue, said California Highway Patrol Officer Jim Bettencourt. The victim's name was not released.

The accident, which occurred about 2:47 a.m., prompted officers to close down a stretch of I-805 for several hours while the investigation was under way. The freeway lanes were reopened about 5:14 a.m.

Bettencourt said the victim was hit by several vehicles, including a semi-truck whose driver did not stop.

"He may not have known that he hit him," Bettencourt said. "Most of the vehicles that hit him did stop."